JP7274245B1 - MOLD RELEASE CONDITION EVALUATION METHOD, MOLD RELEASE CONDITION EVALUATION SYSTEM AND PROGRAM - Google Patents

Abstract

Based on the first surface energy on the surface of the target steel material that constitutes the target mold and the second surface energy on the surface of the target resin material that molds the molded product with the target mold, the target steel material and the target resin material are respectively The target resin an extraction procedure for extracting a work of adhesion corresponding to a material and equal to or greater than the interfacial energy calculated in the calculation procedure; and an evaluation procedure for evaluating mold release conditions when molding a molded product of a target resin material, wherein the evaluation procedure includes the work of adhesion extracted by the extraction procedure and the temperature corresponding to the work of adhesion extracted from the mold. A release condition evaluation method that evaluates as a condition.

Description

TECHNICAL FIELD The present invention relates to a method for evaluating mold release conditions when molding a resin material molded product with a mold.

When molding a molded product with a resin material in a mold, it is common to determine release conditions such as the release temperature and the release speed of the knockout pin based on the conditions recommended by the resin manufacturer and the experience of the craftsman. However, there are many cases in which unintended deformation of the molded product occurs due to poor mold release, and it is necessary to reset the mold release conditions.

As a countermeasure against this problem, in recent years, it has been proposed to evaluate mold release conditions in advance in order to suppress deformation of a molded product due to mold release failure (see Patent Document 1). Specifically, when a composition made of a resin material is transfer-molded on a metal plate and the surface energy of the composition is equal to or higher than a certain value, the releasability is determined to be good.

JP 2009-154536 A

However, with the above technology, since it is necessary to perform molding using each material in advance, it takes a lot of time and money to evaluate the release conditions, such as the need to perform many moldings until the release property is good. There was a problem of doing so.

The present disclosure has been made in order to solve the above problems, and an object of the present disclosure is to make it possible to easily evaluate releasability with less time and cost.

In order to solve the above problems, the first aspect is to provide a first surface energy on the surface of the target steel material that constitutes the target mold and a second surface energy on the surface of the target resin material that molds the molded product with the target mold. a calculation procedure for calculating the interfacial energy of the interface formed by contact between the surfaces of the target steel material and the target resin material, and the adhesion according to the temperature at the interface between each of the plurality of types of resin materials and the target steel material an extraction procedure for extracting, from a database in which work is registered, an adhesion work corresponding to the target resin material and having an adhesion work equal to or greater than the interfacial energy calculated in the calculation procedure; an evaluation procedure for evaluating mold release conditions when molding a molded product of the target resin material with the target mold based on the work of adhesion, wherein the evaluation procedure includes the work of adhesion extracted by the extraction procedure and the It is a mold release condition evaluation method, wherein the temperature corresponding to the work of adhesion is evaluated as the mold release condition.

Also, the above aspect may be the second aspect shown below.
In the second aspect, in the extraction procedure, the adhesion work according to the temperature at the interface between each of the plurality of types of resin materials and the target steel material, and the specific mold release that can be elastically deformed according to the temperature without exceeding the yield point From the database in which speeds are registered, the work of adhesion corresponding to the target resin material and having the surface energy equal to or higher than the interfacial energy calculated in the calculation procedure, and the specific release speed at the temperature corresponding to the work of adhesion are extracted. Then, in the evaluation procedure, the work of adhesion extracted in the extraction procedure, the temperature corresponding to the work of adhesion, and the specific mold release speed are evaluated as the mold release conditions.

Further, the above aspect may be the third aspect shown below.
In the third aspect, a first specifying step of specifying a first surface energy on the surface of the target steel material constituting the target mold, and a second surface energy on the surface of the target resin material for molding the molded product with the target mold. and a second specifying procedure for specifying, wherein in the calculating procedure, based on the first surface energy specified in the first specifying procedure and the second surface energy specified in the second specifying procedure Calculate the interfacial energy.

In the mold releasability evaluation method of the above aspect, adhesion work and temperature can be evaluated as mold release conditions when molding a molded article of the target resin material with the target mold. Therefore, specific release conditions such as release temperature can be easily set based on this evaluation result.

Here, the release conditions can be easily evaluated based on the surface energy of the target steel material and the target resin material, so there is no need to perform molding using each material in advance. can be reduced.

FIG. 1 is a block diagram showing the device configuration of a releasability evaluation system 1 according to an embodiment of the present disclosure; Flowchart showing procedures of release condition evaluation method in one embodiment of the present disclosure FIG. 11 is a diagram showing how a first identification procedure and a second identification procedure are performed in an embodiment of the present disclosure;

Embodiments for carrying out the present invention will be described in detail below with reference to the drawings.
(1) Device configuration

A releasability evaluation system 1 is a device used to implement the releasability evaluation method of the present disclosure, and as shown in FIG. It is a portable information terminal comprising a unit 20, a user interface 30 for communicating with a user, a memory 40 for storing information, and a control unit 50 for controlling the operation of the releasability evaluation system 1 as a whole.

The user interface 30 includes a display 31 and a touch panel 33 installed along the display surface of the display 31 .

(2) Procedure of mold releasability evaluation method; Fig. 2
In this releasability evaluation method, first, a first identification procedure is performed to identify the first surface energy on the surface of the target steel material constituting the target mold (s110). Here, the first surface energy is specified by the droplet method.

Specifically, as shown in FIG. 3, two types of solutions 110 and 120 are separately dropped on the surface of a sample 100 made of the same material as the target steel material, and the contact angles θ1 and θ2 of the respective droplets are After the measurement, the surface energy γA (=dispersive component γAd + polar component γAp) of the target steel material is calculated by solving the simultaneous equations of Equations 1 and 2 below. In these equations, the known surface energies of each solution are calculated as γ1 (=dispersive component γ1d+polar component γ1p) and γ2 (=dispersive component γ2d+polar component γ2p).

The contact angles θ1 and θ2 of the droplet are measured based on the image of the droplet taken from the side by the camera 10, etc. A method of approximately calculating based on is conceivable.
In this embodiment, alloy steel (SKD61) is used as the sample 100, water (H2O) is used as the solution 110, and iodide methane (CH2I2) is used as the solution 120. The measured values of the contact angles θ1 and θ2 of each solution (θ1=85. 4°, θ2 = 37.7°), the surface energy γA of the target steel material was 39.4 mJ/mm2 (= dispersive component γAd + polar component γAp = 38.7 + 0.7). was calculated.

Next, a second identification procedure is performed to identify the second surface energy on the surface of the target resin material for molding the molded product with the target mold (s120). Here, similarly to the above, the second surface energy is specified by the droplet method.

Specifically, two types of solutions 210 and 220 are separately dropped on the surface of a sample 200 made of the same material as the target resin material, and the contact angles θ1 and θ2 of each droplet are measured. 3. Calculate the surface energy γB (=dispersive component γBd + polar component γBp) of the target resin material by solving the simultaneous equations of Equation 4. In these equations, the known surface energies of each solution are calculated as γ1 (=dispersive component γ1d+polar component γ1d) and γ2 (=dispersive component γ2d+polar component γ2p).

本実施形態では、サンプル２００としてポリアミド、溶液１１０として水（Ｈ２Ｏ）、溶液１２０としてジョードメタン（ＣＨ２Ｉ２）をそれぞれ用い、各溶液の接触角θ１、θ２の測定値（θ１＝７８．５°、θ２＝２７．９°）に基づいて上記数式の連立方程式を解いたところ、対象樹脂材料の表面エネルギーγＢとして４５．３ｍＪ／ｍｍ２（＝分散成分γＡｄ＋極性成分γＡｐ＝４１．７＋３．６）が算出された。

In this embodiment, polyamide is used as the sample 200, water (H2O) is used as the solution 110, and iodine methane (CH2I2) is used as the solution 120, respectively. = 27.9°), the surface energy γB of the target resin material was calculated to be 45.3 mJ/mm2 (=dispersive component γAd + polar component γAp = 41.7 + 3.6). rice field.

Next, based on the first surface energy γA specified in s110 and the second surface energy γB specified in s120, a calculation procedure for calculating the interfacial energy at each interface between the target steel material and the target resin material is performed. (s130). Here, the interfacial energy γAB is calculated based on Equation 5 below.

本実施形態では、サンプル１００である合金鋼およびサンプル２００であるポリアミドそれぞれの界面エネルギーγＡＢとして、上記数式に基づいて１．１ｍＪ／ｍｍ２が算出された。

In this embodiment, 1.1 mJ/mm 2 was calculated as the interfacial energy γAB of the alloy steel of sample 100 and the polyamide of sample 200, respectively, based on the above formula.

In the present embodiment, this calculation procedure is one step (interfacial energy calculation process) of the releasability evaluation process executed by the control unit 50 according to the program stored in the built-in memory 51 . Specifically, after obtaining the first surface energy γA and the second surface energy γB by receiving a predetermined operation on the touch panel 33 or receiving it via the communication unit 20, the surface energy A process of calculating γAB is executed.

Next, an extraction procedure is performed to extract the work of adhesion corresponding to the target resin material from a database prepared in advance (s140). For each of the multiple types of resin materials, the database is able to elastically deform without exceeding the yield point depending on the temperature at the interface with the target steel material (= energy required for interface separation) and the work of adhesion depending on the temperature. A specific release speed is registered. Then, in this extraction procedure, from the above database, the adhesion work that is the adhesion work corresponding to the target resin material and is equal to or greater than the interfacial energy calculated in the calculation procedure, and the specific mold release speed at the temperature corresponding to this adhesion work and extract .

In the present embodiment, this extraction procedure is one step (attachment work extraction process) of the releasability evaluation process described above. Specifically, a process of extracting the interfacial energy calculated in the interfacial energy calculation process and the corresponding work of adhesion and specific release speed from a database stored in advance in the memory 40 is executed.

Then, based on the adhesion work extracted by the extraction procedure described above, an evaluation procedure for evaluating mold release conditions when molding a molded product of the target resin material with the target mold is carried out (s150). Here, the work of adhesion extracted in the extraction procedure, the temperature corresponding to this work of adhesion, and the specific mold release speed are evaluated as mold release conditions.

In this embodiment, this evaluation procedure is one step (condition evaluation process) of the releasability evaluation process described above. Specifically, a process of displaying the work of adhesion, the temperature, and the specific release speed extracted in the work of adhesion extraction process on the display 31 together with information on what kind of release conditions should be set based on these parameters is executed. be done.

(3) Modifications Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can take various forms as long as they fall within the technical scope of the present invention. Needless to say.

For example, in the above embodiment, the configuration in which the functions of the releasability evaluation system 1 are installed in a single portable information terminal was exemplified. However, the releasability evaluation system 1 may be one in which each necessary function is distributed among a plurality of devices.

(4) Effect In the method for evaluating releasability of the above-described embodiment, adhesion work, temperature, and specific release speed can be evaluated as release conditions when molding a molded product of a target resin material with a target mold. can. Therefore, specific mold release conditions such as mold release temperature and mold release speed can be easily set based on this evaluation result.

Here, the release conditions can be easily evaluated based on the surface energy of the target steel material and the target resin material (see Fig. 3). can reduce the time and cost required for

In the mold releasability evaluation method of the present disclosure, adhesion work, temperature, and specific mold release speed can be evaluated as mold release conditions when molding a molded product of a target resin material with a target mold.

DESCRIPTION OF SYMBOLS 1... Releasability evaluation system 10... Camera 20... Communication part 30... User interface 31... Display 33... Touch panel 40... Memory 50... Control part 51... Built-in memory 100... Sample 110... Solution, 120... Solution, 200... Sample, 210... Solution, 220... Solution.

Claims (5)

A release condition evaluation method using a release condition evaluation system comprising: a calculation means for calculating interfacial energy; an extraction means for extracting work of adhesion registered in a database; and an evaluation means for evaluating release conditions. hand,
The calculating means calculates the target steel material and the a calculation procedure for calculating the interfacial energy of the interface formed by the surfaces of the target resin materials coming into contact with each other;
The extracting means extracts the work of adhesion corresponding to the target resin material from a database in which the work of adhesion corresponding to the temperature at the interface between each of a plurality of types of resin materials and the target steel material is registered, and An extraction procedure for extracting the work of adhesion that is equal to or greater than the interfacial energy calculated by
an evaluation procedure in which the evaluation means evaluates a mold release condition when molding a molded product of the target resin material with the target mold based on the work of adhesion extracted in the extraction procedure,
In the evaluation procedure, the evaluation means evaluates the work of adhesion extracted in the extraction procedure and a temperature corresponding to the work of adhesion as the release conditions.
A release condition evaluation method. In the extraction procedure, the extraction means performs adhesion work according to the temperature at the interface between each of the plurality of types of resin materials and the target steel material, and a specific mold release that can be elastically deformed without exceeding the yield point according to the temperature. From the database in which speeds are registered, the work of adhesion corresponding to the target resin material and having the surface energy equal to or higher than the interfacial energy calculated in the calculation procedure, and the specific release speed at the temperature corresponding to the work of adhesion are extracted. hand,
In the evaluation procedure, the evaluation means evaluates the work of adhesion extracted in the extraction procedure, the temperature corresponding to the work of adhesion, and the specific mold release speed as the mold release conditions.
The mold release condition evaluation method according to claim 1. When the mold release condition evaluation system further comprises first specifying means and second specifying means for specifying surface energy,
a first identifying procedure in which the first identifying means identifies a first surface energy on the surface of the target steel material constituting the target mold;
The second identifying means includes a second identifying procedure for identifying a second surface energy on the surface of the target resin material for molding the molded product with the target mold,
In the calculating step, the calculating means calculates the interfacial energy based on the first surface energy specified in the first specifying step and the second surface energy specified in the second specifying step. ,
The mold release condition evaluation method according to claim 1 or 2. Based on the first surface energy on the surface of the target steel material that constitutes the target mold and the second surface energy on the surface of the target resin material that molds the molded product with the target mold, the target steel material and the target resin material are respectively a calculating means for calculating the interfacial energy of the interface formed by contacting the surfaces of
The work of adhesion corresponding to the target resin material from a database in which the work of adhesion corresponding to the temperature at the interface between each of a plurality of types of resin materials and the target steel material is registered, and the interfacial energy calculated by the calculation means. Extraction means for extracting the above adhesion work,
evaluation means for evaluating mold release conditions when molding a molded product of the target resin material with the target mold based on the work of adhesion extracted by the extraction means;
The evaluation means evaluates the work of adhesion extracted by the extraction means and the temperature corresponding to the work of adhesion as the release condition.
Release condition evaluation system. A program for causing a computer to function as each means according to claim 4.

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